Opening and closing device for A curtain

ABSTRACT

An opening and closing device for a curtain mounted on a guiding part, the guiding part is provided with the curtain; the opening and closing device is used for driving automatic opening and closing of the curtain; the opening and closing device includes a mainframe and a connecting mechanism. The mainframe includes a shell, a driver and a driving wheel; the driving wheel and the driver are mounted in the shell, the driver drive the driving wheel to rotate. The connecting mechanism includes a hanging piece and a bracket; a first end of the bracket is inserted into the shell, the hanging piece is movably connected with a second end of the bracket and hung on the guiding part; the hanging piece can be moved vertically relative to the bracket so that the driving wheel is attached closely to the outer wall of the guiding part.

FIELD OF THE INVENTION

The present invention relates to smart furniture technical field, moreparticularly, to an opening and closing device for a curtain.

BACKGROUND OF THE INVENTION

Traditional opening and closing device for curtain is mounted on aguiding part for curtain. The position of the opening and closing devicefor curtain can not be adjusted. Its adaptability is poor, and it cannot be well adapted to a variety of different sizes of guide parts.

SUMMARY OF THE INVENTION

Base on this, it is necessary to provide an opening and closing devicefor curtain to overcome the poor adaptability of the exiting opening andclosing device for curtain.

An opening and closing device for a curtain, the curtain is hung on aguiding part, the opening and closing device for the curtain is mountedon the guiding part to drive automatic opening and closing of thecurtain; the opening and closing device for the curtain includes amainframe and a connecting mechanism.

The mainframe includes a shell, a driver and a driving wheel; thedriving wheel is mounted in the shell and attached closely to an outerwall of the guiding part, the driver is arranged in the shell and drivethe driving wheel to rotate.

The connecting mechanism includes a hanging piece and a bracket; a firstend of the bracket is inserted into the shell, the hanging piece ismovably connected with a second end of the bracket and hung on theguiding part; the hanging piece can be moved vertically relative to thebracket so that the driving wheel is attached closely to the outer wallof the guiding part.

The driving wheel is rolled along the guiding part under the drivingfrom the driver to bring the hanging piece to move along the guidingpart and pull and push the curtain.

In the opening and closing device for the curtain, the hanging piece canbe moved vertically relative to the bracket, by adjusting the positionof the hanging piece relative to the shell, the tightness degree of thedriving wheel and the outer wall of the guide member can be adjusted,and the applicability of the connecting mechanism can be improved.

In one embodiment, the connecting mechanism also includes a lockedcomponent, the hanging piece is provided with a cavity, the lockedcomponent is disposed in the cavity, when the hanging piece is movedvertically relative to the bracket, the locked component can lock arelative position of the hanging piece and the bracket.

In one embodiment, the locked component includes a shaft and a wedge,thewedge is connected to the shaft, the shaft is movably arranged in thecavity, a second end of the bracket is provided with a rack, the rack ispassed through the cavity and mesh with the wedge.

In one embodiment, the locked component also includes a first elasticmember and a compressing piece, the compressing piece is movably passedthrough the hanging piece and fixed with the shaft, the first elasticmember is connected with the wedge.

When the first elastic member is in natural state,the wedge is meshedwith the rack, the compressing piece is pressed to drive the shaft torotate so as to drive the the wedge away from the rack, the the firstelastic member is in compressed state.

In one embodiments, the bracket includes a first rod, a transfer and asecond rod; the first rod and the second rod are respectivelyperpendicularly connected to two ends of the transfer and extend indifferent directions; the first rod is movably connected to the shell ,the rack is arranged on the second rod.

In one embodiments, the hanging piece includes a first hanging portionand a second hanging portion connected to the first hanging portion, thesecond hanging portion is passed through the first hanging portion andapproximately perpendicular to the first hanging portion, the secondhanging portion is hung on the guiding part.

In one embodiments, the second hanging portion includes a firstcantilever and a second cantilever which are connected in an angle.

In one embodiments, the connecting mechanism also includes rollers; thefirst cantilever and the second cantilever are at least provided withone of the rollers; when the roller is hanging on the guiding part, theroller is in rolling contact with the guiding part.

In one embodiments, the shell includes a base and a connector which isdetachable connecting with the base, the connector is provided with agroove, the first rod can movably inserted into the groove.

In one embodiments, the hanging piece includes a first shell, a secondhell, a third shell and the fourth shell; the second hell, the thirdshell and the fourth shell are detachably connected to different sidesof the first shell.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a combination perspective view of the opening and closingdevice for curtain, the curtain and the guiding part according to thepresent invention.

FIG. 2 is a perspective view of the opening and closing device forcurtain according to the present invention

FIG. 3 is an explosive view of the opening and closing device forcurtain shown in FIG. 2 according to the present invention.

FIG. 4 is the other explosive view of the opening and closing device forcurtain shown in FIG. 2 according to the present invention.

FIG. 5 is a perspective view of the opening and closing device forcurtain shown in FIG. 2 according to the present invention.

FIG. 6 is a part enlarge view of the A part shown in FIG. 5 according tothe present invention.

FIG. 7 is a perspective view of the hanging piece of the opening andclosing device for curtain shown in FIG. 2 according to the presentinvention.

FIG. 8 is an explosive view of the hanging piece shown in FIG. 7according to the present invention.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

In order to make the above purpose, characteristics and advantages ofthe invention more obvious and easy to understand, the concreteembodiments of the invention are described in details in combinationwith the attached drawings. Many details are described in the followingdescription to facilitate full understanding of the invention. However,the invention can be implemented in many other ways different from thosedescribed herein, and technicians in the field can make similarimprovements without violating the connotation of the invention, so theinvention is not restricted by the embodiments disclosed below.

In the description of the present invention, it needs to be understoodthat the azimuth or the position relations indicated in the terms“center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”,“upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”,“horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”,“counterclockwise”, “axial”, “radial”, “circumferential” and so on arebased on the azimuth or position relations shown in the attacheddrawings, only for the convenience of describing the present inventionand simplifying the description, rather than indicating or implying thatthe device or element referred to must have a specific orientation, beconstructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

Furthermore, the terms “first”, “second” are used only for descriptivepurposes and can not be understood as indicating or implying relativeimportance or implicitly indicating the number of technical featuresindicated. Thus, the qualification of “first” and “second” may includeat least one feature explicitly or implicitly. In the description of theinvention, the meaning of “multiple” is at least two, such as two,three, etc., unless otherwise specified.

In the present invention, the terms “installation”, “connection”,“fixation” and other terms shall be broadly understood, for example,either fixed connection or detachable connection or integration; eithermechanical connection or electrical connection; either direct connectionor indirect connection through an intermediate medium, or internalconnection of two elements or interaction of two elements, unlessotherwise expressly qualified. For ordinary technicians in this field,the specific meaning of the above terms in the invention can beunderstood according to the specific circumstances.

In the present invention, unless otherwise specified and qualified, thefirst feature “upper” or “lower” in the second feature may be the firstand second features in direct contact, or the first and second featuresin indirect contact through intermediate media. Moreover, the firstfeature is above the second feature, but the first feature is directlyabove or oblique above the second feature, or only indicates that thefirst feature level is higher than the second feature. The first featureunder the second feature”, “below” may be the first feature directlybelow or obliquely below the second feature, or only indicate that thefirst feature level height is less than the second feature.

It should be noted that when a component is called “fixed to” or “setto” another component, it can be directly on another component or canexist in the center. When one element is considered to be “connected” toanother element, it can be directly connected to another element or mayexist at the same time. the terms “vertical”, “horizontal”, “upper”,“lower”, “left”, “right” and similar expressions used in this paper arefor illustrative purposes only and do not indicate that they are theonly means of implementation.

Referring to FIG. 1, it shows a perspective view of an opening andclosing device for a curtain 10 in one embodiments according to thepresent invention. The opening and closing device for the curtain 10 ismounted on a guiding part 30, the curtain 20 is movably arranged on theguiding part 30. The opening and closing device for the curtain 10 isused for driving the curtain 20 to move along the guiding part 30 torealize the automatic opening and closing of the curtain 20.

In the embodiment, referring to FIG. 2, the opening and closing devicefor the curtain 10 includes a mainframe 100 and a connecting mechanism200, the connecting mechanism 200 is connected with the mainframe 100and hanged on the guiding part 30. The mainframe 100 can drive the theconnecting mechanism 200 to move along the guiding part 30 and pull andpush the curtain 20 to move along the guiding part 30.

In the embodiment, the curtain 20 is provided with a few through holesor rings 21, the guiding part 30 is passed through the through holes orrings 21 so as to hang the curtain 20 on the guiding part 30. Theconnecting mechanism 200 is hung on the guiding part 30 and between twoof the through holes or rings 21. When the mainframe 100 drives theconnecting mechanism 200 to move along the guiding part 30, theconnecting mechanism 200 moves along the guiding part 30 and pulls andpushes the curtain 20 to move on the guiding part 30 so as to realizethe automatic closing and opening of the curtain 20.

It should be noted that the guiding part 30 can be a guiding rail, aguiding bar or other curtain supporting structure, the guiding part 30can be integrated or spliced structures. The guiding part 30 may be of astraight, S or other irregular shape; the shape of the guiding part 30is not limited in the present invention.

Referring to FIG. 2 and FIG. 3, the mainframe 100 includes a shell 110,a driver 130 and a driving wheel 120. The driving wheel 120 and thedriver are mounted in the shell 110, the driving wheel 120 is attachedclosely to an outer wall 31 of the guiding part 30, when the driverdrives the driving wheel 120 to rotate, the driving wheel 120 is rolledalong the guiding part 30.

It should be noted that when the guiding part 30 is cylindrical, thedriver is attached closely to the circumferential side wall of theguiding part 30; when the cross section of the guiding part 30 issquare, the driver is attached closely to a bottom wall of the guidingpart 30.

In one embodiment, referring to FIG. 3, the shell 110 is provided withan inner cavity 111, the driving wheel 120 is pivoted to the shell 110and at least partially exposed to the inner cavity 111. Referring toFIG. 2, a part of the driving wheel 120 exposed outside the inner cavity111 is attached to the outer wall 31 of the guiding part 30.

In an embodiment, because of the friction exiting between the drivingwheel 120 and the guiding part 30, the driving wheel 120 can move alongthe guiding part 30 under the driving of the driver 130, the mainframe100 can bring the connecting mechanism 200 to move along the guidingpart 30 and pull and push the curtain 20 on the guiding part 30, so asto realize the automatic opening and closing of the curtain 20. Theopening and closing of the curtain 20 is not need manual, it is easy tooperate and practical.

In some embodiments, the driver 130 is a motor, the driver 130 iscoaxially arranged in the driving wheel 120 to facilitate the smoothmotion of the driving wheel 120 and make full use of space. In someother embodiments, the driver 130 also can be a cylinder.

Referring to FIG. 2 and FIG. 3, the connecting mechanism 200 includes ahanging piece 210 and a bracket 220. A first end 220 a of the bracket220 is inserted into the shell 110, the hanging piece 210 is movablyconnected with a second end 220 b of the bracket 220 and hung on theguiding part 30. The hanging piece 210 can be moved vertically relativeto the bracket 220 so that the driving wheel 120 is attached closely tothe outer wall 31 of the guiding part 30.

It should be understood that when the sizes of the guiding parts 30 aredifferent, by adjusting the position of the hanging piece 210 relativeto the shell 110, the tightness degree of the driving wheel 120 and theouter wall 31 of the guiding part 30 can be adjusted, and theapplicability of the connecting mechanism 200 can be improved.

Concretely, referring to FIG. 4, the connecting mechanism 200 alsoincludes a locked component 230. The hanging piece 210 is provided witha cavity 210 a, the locked component 230 is disposed in the cavity 210a, when the hanging piece 210 is moved vertically relative to thebracket 220, the locked component 230 can lock a relative position ofthe hanging piece 210 and the bracket 220.

Referring to FIG. 5 and FIG. 7, the hanging piece 210 is provided withan avoiding slot 210 b, the avoiding slot 210 b runs through the hangingpiece 210 along the vertical direction and is connected with a cavity210 a. The second end 220 b of the bracket 220 can pass through theavoiding slot 210 b and move up and down in the avoiding slot 210 b, thelocked component 230 is arranged in the cavity 210 a.

In an embodiment, the second end 220 b of the bracket 220 is providedwith racks 221. The locked component 230 includes a shaft 231, a wedge232 and a first elastic member 233. The shaft 231 is rotated in thecavity 210 a, the wedge 232 is connected to the shaft 231 and can meshwith the rack 221, the first elastic member 233 is connected to thewedge 232 and is attached to the inner wall of the cavity 210 a.

When the first elastic member 233 is in natural state, the wedge 232 canmesh with the rack 221; when the shaft 231 is moved to drive the wedge232 away from the rack 221, the first elastic member 233 is incompressed state.

Further, the locked component 230 also includes a compressing piece 234,the compressing piece 234 is fixed with the shaft 231 and movably passedthrough the hanging piece 210. By compressed the compressing piece 234to drive the shaft 231 to move, so that the wedge 232 is away from therack 221 or close to the rack 221.

In an embodiment, referring the FIG. 5, each tooth of the rack 221includes an inclined surface 221 a and a bottom 221 b, the inclinedsurface 221 a is inclined towards the first end 220 a close to thebracket 220, the wedge 232 has a wedge surface 232 a and a top 232 b.When the wedge 232 is meshed with the rack 221, the top 232 b of thewedge 232 is attached to the bottom 221 b of the rack 221.

When the first elastic member 233 is in natural state, the hanging piece210 can move upwards relative to the bracket 220, the wedge 232 is heldbetween two teeth of the rack 221, at this time, the top 232 b of thewedge 232 is attached to the bottom 221 b of the rack 221.

When the hanging piece 210 is needed to move downward relative to thebracket 220, referring to FIG. 6, the wedge surface 232 a of the wedge232 is slid along the inclined surface 221 a of the rack 221, the firstelastic member 233 is naturally compressed so that the wedge surface 232a is disengaged from the tip of the rack 221 and jumps one by one overthe teeth and move downward; when the hanging piece 210 is needed tomove upward relative to the bracket 220, the compressing piece 234 iscompressed to drive the wedge 232 away from the the rack 221, the firstelastic member 233 is in compressed state, the wedge surface 232 a isaway from the inclined surface 221 a so that the hanging piece 210 ismoved upward to the appropriate position relative to the bracket 220.

Through the above structure, when the hanging piece 210 moves down, thewedge 232 can be positioned and not easily detached from the bracket220; when the hanging piece 210 moves up, it is necessary to press thecompressing member 234 first to prevent the hanging piece 210 fromsliding freely due to load bearing. It ensures safety during use.

In some embodiments, the first elastic member 233 is a spring orshrapnel. The wedge 232 is a claw or gear shaft.

In some embodiments, the shaft 231, the wedge 232 and the compressingmember 234 are integrated molding structure with good integrity and highmechanical strength. In some other embodiments, the shaft 231, the wedge232 and the compressing member 234 also may be divided structures.

In the embodiments shown in FIG. 3, the bracket 220 includes a first rod222, a transfer 223 and a second rod 224. The first rod 222 and thesecond rod 224 are respectively perpendicularly connected to two ends ofthe transfer 223 and extend in different directions. The first rod 222is movably connected to the shell 110, the rack 221 is arranged on thesecond rod 224.

In some embodiments, the first rod 222, the transfer 223 and the secondrod 224 are integrated molding structure for quick installation. In someother embodiments, the first rod 222, the transfer 223 and the secondrod 224 also may be telescopic structures to accommodate different sizesof the mainframes 100 and the connecting piece 210 s, and to expand theapplication scope of the brackets 220.

Please also referring to FIG. 3, the shell 110 includes a base 112 andtwo connectors 113 whichare detachable connecting with the base 112.

In the embodiments, the cavity 111 is arranged in the base 112 andcontains the driver 130 and the driving wheel 120. Each of theconnectors 113 is provided with a groove 114, the first rod 222 canmovably inserted into the groove 114. Through this structure, when thehanging piece 210 is damaged for being used a long time, It only needsto replace the hanging piece 210 or the bracket 220, and the shell 110does not need to be replaced as a whole, which is conducive to the reuseof resources.

In some embodiments, each of the connectors 113 is provided with twosnap-fits 113 a, the base 110 is provided with snap-fit grooves 115,Each of the snap-fit 113 a is held in one of the snap-fit grooves 115 soas to connect the connector 113 and the base 112. Concretely, thesnap-fits 113 a are elastic elements which hold with the snap-fitgrooves 115 in nature state and take off from the snap-fit grooves 115under pressing.

In some other embodiments, the connector 113 and the base 112 can beconnected by threaded connections or screws.

Referring to FIG. 1 and FIG. 7, in some embodiments, the hanging piece210 includes a first hanging portion 211 and a second hanging portion212 connected with the first hanging portion 211, the second rod 224 ispassed through the first hanging portion 211, the second hanging portion212 is arranged on the guiding part 30.

In the embodiments, the first hanging portion 211 is arrangedhorizontally, the avoiding slot 210 b is arranged in the first hangingportion 211, the second rod 224 is passed through the avoiding slot 210b and is roughly perpendicular to the hanging portion 211.

In the embodiments, the second hanging portion 212 includes a firstcantilever 213 and a second cantilever 214 which are connected in anangle between 30-150° to form V shape so as to contribute to the secondhanging portion 212 to hang on the guiding part 30.

Further, referring to FIG. 7 and FIG. 8, the connecting mechanism 200also includes rollers 240 arranged in the second hanging portion 212,the first cantilever 213 and the second cantilever 214 are at leastprovided with one of the rollers 240. When the connecting mechanism 200is hanging on the guiding part 30, the rollers 240 are in rollingcontact with the guiding part 30.

In the embodiments, the rollers 240 are trolley wheels.

It should be understood that the rollers 240 are in contact with theguiding part 30 to avoid the second hanging portion 212 and the guidingpart 30 to produce greater resistance, at the same time, the abrasion ofthe second hanging portion 212 and the guiding part 30 can be reduced,and the service life of the hanging piece 210 can be prolonged.

In some embodiments, the first cantilever 213 and the second cantilever214 are rotatably connected with at least two of the rollers 240respectively. Two of the rollers 240 are arranged at intervals, which isconducive to the smooth slip of the hanging portion 212 and reduces thesloshing caused by the instability of the hanging portion 212.

Referring to FIG. 8, the hanging piece 212 is detachable structure,which facilitates the installation of the components in the hangingpiece 210.

For example, the hanging piece 210 includes a first shell 215, a secondhell 216, a third shell 217 and the fourth shell 218. The second shell216 and the third shell 217 are respectively connected to both sides ofthe first shell 215, the fourth shell 218 is connected to a bottom ofthe first shell 215. The first shell 215, the second hell 216, the thirdshell 217 and the fourth shell 218 are clamped and enclosed to form thecavity 210 a which is convenient for the disassembly and assembly of thecomponents in the cavity 210 a.

The technical features of the above embodiments can be combinedarbitrarily. In order to make the description concise, all possiblecombinations of the technical features in the above embodiment are notdescribed.However, as long as the combinations of these technicalfeatures are not contradictory, they should be considered as in thescope of the present invention.

The above embodiment only expresses several embodiments of theinvention, and its description is more specific and detailed, but cannot be understood as a limitation on the scope of the invention patent.It should be pointed out that for ordinary technicians in this field, anumber of deformations and improvements can be made without breakingaway from the conception of the invention, which belong to theprotection scope of the invention. Therefore, the scope of protection ofthe patent of the invention shall be subject to the

What is claimed is:
 1. An opening and closing device for a curtain, saidcurtain is hung on a guiding part; said opening and closing device isused for driving said curtain to move along said guiding part, whereinsaid opening and closing device comprising: a mainframe, comprising ashell, a driver and a driving wheel; said driver and said driving wheelis mounted in said shell, said driver drives said driving wheel torotate; a connecting mechanism, comprising a bracket with a first endand a second end, and a hanging piece; said first end of said bracket isinserted into said shell, said second end of said bracket is movablyconnected with said hanging piece, said hanging piece is hung on saidguiding part; said hanging piece can be moved vertically relative tosaid bracket so that said driving wheel is attached closely to an outerwall of said guiding part; when said driver drives said driving wheel torotate, said driving wheel is rolled along said guiding part, and saidmainframe drives said hanging piece to move along said guiding piece andto push and pull said curtain.
 2. The opening and closing device forsaid curtain according to claim 1, wherein said connecting mechanismalso includes a locked component, said hanging piece is provided with acavity, said locked component is disposed in said cavity, when saidhanging piece can be moved vertically relative to said bracket, saidlocked component can lock said hanging piece and said bracket.
 3. Theopening and closing device for said curtain according to claim 2,wherein said locked component includes a shaft and a wedge; said wedgeis connected to said shaft, said shaft is movably arranged in saidcavity, said second end of said bracket is provided with a rack, saidrack is passed through said cavity and meshed with said wedge.
 4. Theopening and closing device for said curtain according to claim 3,wherein said locked component also includes a first elastic member and acompressing piece; said compressing piece is movably passed through saidhanging piece and fixed with said shaft, said first elastic member isconnected with said wedge; when said first elastic member is in naturalstate, said wedge is meshed with said rack, said compressing piece ispressed to drive said shaft to rotate so as to drive said said wedgeaway from said rack, said first elastic member is in compressed state.5. The opening and closing device for said curtain according to claim 3,wherein said bracket includes a first rod, a transfer and a second rod;said first rod and said second rod are respectively perpendicularlyconnected to two ends of said transfer and extend in differentdirections; said first rod is movably connected to said shell , saidrack is arranged on said second rod.
 6. The opening and closing devicefor said curtain according to claim 5, wherein said hanging pieceincludes a first hanging portion and a second hanging portion connectedto said first hanging portion, said second rod is passed through saidfirst hanging portion and approximately perpendicular to said firsthanging portion, said second hanging portion is hung on said guidingpart.
 7. The opening and closing device for said curtain according toclaim 6, wherein said second hanging portion includes a first cantileverand a second cantilever which are connected in an angle between 30-150°.8. The opening and closing device for said curtain according to claim 7,wherein said connecting mechanism also includes rollers; said firstcantilever and said second cantilever are at least provided with one ofsaid rollers; when said roller is hanging on said guiding part, saidroller is in rolling contact with said guiding part.
 9. The opening andclosing device for said curtain according to claim 5, wherein said shellincludes a base and a connector which is detachable connecting with saidbase, said connector is provided with a groove, said first rod canmovably inserted into said groove.
 10. The opening and closing devicefor said curtain according to claim 1, wherein said hanging pieceincludes a first shell, a second hell, a third shell and a fourth shell;said second hell and said third shell are respectively connected to bothsides of the first shell, said fourth shell is connected to a bottom ofthe first shell; said first shell, said second hell, said third shelland said fourth shell are clamped and enclosed to form a cavity.